Multiplex communications – Diagnostic testing – Determination of communication parameters
Reexamination Certificate
2003-04-15
2008-10-07
Nguyen, Brian D (Department: 2616)
Multiplex communications
Diagnostic testing
Determination of communication parameters
C370S335000, C370S350000
Reexamination Certificate
active
07433321
ABSTRACT:
Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).
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Grilli Francesco
Subrahmanya Parvathanathan
Wheatley III Charles E.
Willenegger Serge
Katbab Abdollah
Nguyen Brian D
Qualcomm Incorporated
Rouse Thomas R.
Tam Kam T.
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